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Composite long-acting formaldehyde remover and preparation method thereof

A formaldehyde scavenger, long-acting technology, applied in the direction of protective devices against harmful chemicals, etc., can solve the problems of secondary pollution and inconvenient use, and achieve the effect of no secondary pollution and convenient use

Active Publication Date: 2012-05-09
钟强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of indoor formaldehyde pollution mostly uses solid materials to physically adsorb or chemically adsorb the formaldehyde released in the air, such as activated carbon, bamboo charcoal, plant extracts, polymer gels, etc., which have achieved certain results in the market. , but it is inconvenient to use and often replaced, causing secondary pollution

Method used

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  • Composite long-acting formaldehyde remover and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 16kg each of 6-O-carboxylated chitosan and urea according to the formula, add water to dissolve them respectively, prepare a single-component solution with a concentration of 16%, and then mix the two solutions according to a volume ratio of 1:1. .

[0020] 100g of the above-mentioned composite long-acting formaldehyde scavenger coated on 1m 2 After the surface of the three-plywood glued by urea-formaldehyde resin is dried, three disc samples with a diameter of 100mm are removed, collected by closed air blowing, and tested by acetylacetone spectrophotometry. The three-plywood glued with urea-formaldehyde resin, which is coated with compound long-acting formaldehyde scavenger, can completely and effectively remove residual formaldehyde, and the removal rate can reach 99.8%.

Embodiment 2

[0022] Weigh 10kg each of 6-O-carboxylated chitosan and urea according to the formula, add water to dissolve them respectively, prepare a single-component solution with a concentration of 10%, and then mix the two solutions according to a volume ratio of 1:1. .

[0023] 100g of the above-mentioned composite long-acting formaldehyde scavenger coated on 1m 2 After the surface of the three-plywood glued by urea-formaldehyde resin is dried, three disc samples with a diameter of 100mm are removed, collected by closed air blowing, and tested by acetylacetone spectrophotometry. The plywood glued with urea-formaldehyde resin of the agent was used for the control test, and the compound long-acting formaldehyde scavenger can completely and effectively remove the residual formaldehyde, and the removal rate can reach 99.8%.

Embodiment 3

[0025] Weigh 20kg each of 6-O-carboxylated chitosan and urea according to the formula, add water to dissolve them respectively, prepare a single-component solution with a concentration of 20%, and then mix the two solutions according to a volume ratio of 1:1. .

[0026] 100g of the above-mentioned composite long-acting formaldehyde scavenger coated on 1m 2 After the surface of the three-plywood glued by urea-formaldehyde resin is dried, three disc samples with a diameter of 100mm are removed, collected by closed air blowing, and tested by acetylacetone spectrophotometry. The plywood glued with urea-formaldehyde resin of the agent was used for the control test, and the compound long-acting formaldehyde scavenger can completely and effectively remove the residual formaldehyde, and the removal rate can reach 99.8%.

[0027] figure 1 Is the FTIR spectrum, from the infrared spectrum can prove that when 6-O-carboxymethyl chitosan and formaldehyde adsorption reaction, 1594cm -1 Th...

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Abstract

The invention discloses a composite long-acting formaldehyde remover, comprising the following components by weight percent: 5-10% of 6-O-carboxymethyl chitosan and 5-10% of urea, the balance of water, and the sum of the components is 100%. Deacetylated degree of the 6-O-carboxymethyl chitosan is more than 90%, substitution degree is 60-70%, and weight-average molecular weight is 20000-500000. The components are weighed by the formula, the 6-O-carboxymethyl chitosan and urea are respectively added with water to be dissolved, and then the two solutions are mixed and compounded by the volume ratio of 1:1, thus obtaining the remover. The composite long-acting formaldehyde remover is convenient to use, the remover is coated on the surface of objects capable of releasing formaldehyde such as wall, furniture and textile, formaldehyde released by furniture, floor board and wall paper in house decoration can be effectively removed, no dead angle is kept, the remover is long-term effective, and no secondary pollution is produced, thus ensuring that human settlement is not puzzled or threatened by formaldehyde any longer.

Description

technical field [0001] The invention relates to a composite long-acting formaldehyde scavenger and a preparation method thereof Background technique [0002] Most of people's work and living time are carried out indoors, and the indoor environment is greatly related to people's safety and health. However, the creation of an indoor environment is inseparable from decorative materials, and decorative materials are related to chemical substances. Some chemical substances emit toxic gases in different forms and in different ways, causing pollution, among which formaldehyde pollutants are the most common. [0003] Formaldehyde is a colorless, soluble, irritating gas, which is a toxic substance. High concentrations of formaldehyde are harmful to the nervous system, immune system, and liver. It is a cytoplasmic poison, it can directly act on amino, sulfhydryl and carboxyl groups to generate methine derivatives, thereby destroying body proteins and enzymes, causing irreversible coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/30A62D101/28
Inventor 马昕龙沈学优
Owner 钟强
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